Daylight through the yearLongest day (Jun 21): 15 h 28 min5:57 am – 9:25 pmShortest day (Dec 21): 8 h 54 min8:10 am – 5:04 pm
Sun todaySunrise –Sunset –
ClimateWarmest month July: highs 90°F, lows 61°FColdest month January: highs 32°F, lows 9°F21 in of rain a year, on about 45 dayswettest month June40 in of snow a year, on about 18 days44 days above 90°F, 166 nights below freezing in a typical yearSource: NOAA 1991-2020 Climate Normals, Kennebec station, 4 mi away
Parks and public landsBrakkestate conservation land · 6.6 mi · 208 acresFate Damstate conservation land · 10.5 mi · 322 acresSharpe Recreation Arearecreation area · 16.3 mi · 78,431 acresJoe Creek Recreation Areastate recreation area · 19.7 mi · 66 acresFort Pierre National Grasslandnational grassland · 22.6 mi · 115,811 acresSource: USGS Protected Areas Database (PAD-US)
Earthquakes4 of magnitude 3 or more within 50 miles since 19701 of magnitude 4+, 0 of magnitude 5+Largest: magnitude 4.4 on 4 Mar 198332 mi away, near Fort Thompson, South DakotaMost recent: magnitude 3.2 on 5 Aug 202234 mi awaySource: USGS Earthquake Catalog
Natural hazardsOverall risk Very LowLyman County, SD, compared with all US countiesHighest-rated hazardsCold wave Relatively ModerateWinter weather Relatively ModerateSource: FEMA National Risk Index (county level)
Air quality93% of days had good air in 2025333 of 358 days measured24 moderate, 1 unhealthy for sensitive groups daysMedian index 18, worst day 112main pollutant: fine particles (PM2.5)Source: US EPA Air Quality Index, nearest monitors: Hughes County, SD, 37 mi away
Drinking waterTripp County Water User Districtserves 4,860 people from ground waterNo health-based violations since 2021Source: US EPA Safe Drinking Water Information System, largest system in the county
Elevation1,809 ft551 m above sea levelSource: USGS 3D Elevation Program
Local servicesPost officeKennebec Post Office3.6 miPoliceLyman County Sheriff's Office3.6 miFire stationKennebec Fire Department3.6 miSource: USGS National Structures Dataset
Getting aroundAirportPierre Regional Airport PIR43 miInterstateI-901.6 miUS highwayUS 18311 miCoachVivianJefferson Lines25 miSources: OurAirports; US Census Bureau TIGER roads; Bureau of Transportation Statistics NTAD
Distances in these cards are measured from the centre of the 57542 ZIP area.
